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# parametric equations (c4) watch

1. Hi,
I couldnt do the following question :

i) Show that

My working :

?

Thanks!
2. Just add the two equations together.
3. (Original post by Glutamic Acid)
Just add the two equations together.
OOOOOOOOOOOOOOOOOOOOOH yes!

I feel like an idiot now!

Thanks!
Cheers mate!
4. The next part goes :

ii) Hence write down the value of t corresponding to the piont (3, 1 ) on the curve

Do u find dy/dx using ?

This question doesnt make sense to me as :

iii) Find the gradient of the curve at the point (3, 1) ??

Thanks.
5. For (ii) Use the result in (i): . You'll then have t.

For (iii), you're right, find dy/dx (either by your way or .
6. (Original post by Glutamic Acid)
For (ii) Use the result in (i): . You'll then have t.

For (iii), you're right, find dy/dx (either by your way or .

Kooool.

Thanks!

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Updated: November 10, 2008
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